{
    "error": "invalid_grant",
    "error_description": "Bad credentials"
}

{
    "timestamp": "...",
    "status": 400,
    "path": "/oauth/token",
    "errors": [
        {
            "code": 20,
            "error": "Bad credentials",
            "message": "The username and password provided are incorrect"
        }
    ]
}